:root {
  --bg: #ffffff; --fg: #1b1f24; --muted: #57606a; --accent: #0b5cad; --accent-fg: #ffffff;
  --border: #d0d7de; --error-bg: #ffebe9; --error-fg: #a40e26; --ok-bg: #dafbe1; --ok-fg: #116329;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117; --fg: #e6edf3; --muted: #9da7b3; --accent: #4493f8; --accent-fg: #0d1117;
    --border: #30363d; --error-bg: #3d1418; --error-fg: #ffa198; --ok-bg: #12261e; --ok-fg: #7ee787;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); }
.skip-link { position: absolute; left: -999px; top: 0; padding: .5rem 1rem; background: var(--accent); color: var(--accent-fg); }
.skip-link:focus { left: 0; z-index: 10; }
.site-header { display: flex; flex-wrap: wrap; gap: .5rem 1rem; justify-content: space-between; align-items: center; padding: .75rem 1rem; border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; text-decoration: none; color: var(--fg); }
.site-header nav { display: flex; align-items: center; gap: .75rem; }
.who { color: var(--muted); }
main { max-width: 46rem; margin: 0 auto; padding: 1.5rem 1rem; }
.site-footer { max-width: 46rem; margin: 0 auto; padding: 1rem; color: var(--muted); }
.inline { display: inline; margin: 0; }
.link-button { background: none; border: 0; padding: 0; color: var(--accent); text-decoration: underline; cursor: pointer; font: inherit; }
.button { display: inline-block; padding: .5rem 1rem; border: 0; border-radius: .375rem; background: var(--accent); color: var(--accent-fg); text-decoration: none; font: inherit; cursor: pointer; }
.stack > * + * { margin-top: 1rem; }
.field label { display: block; font-weight: 600; margin-bottom: .25rem; }
.field input { width: 100%; max-width: 24rem; padding: .5rem; border: 1px solid var(--border); border-radius: .375rem; background: var(--bg); color: var(--fg); font: inherit; }
.errors, .errorlist { background: var(--error-bg); color: var(--error-fg); padding: .5rem .75rem; border-radius: .375rem; list-style: none; margin: .5rem 0 0; }
.messages { list-style: none; max-width: 46rem; margin: .75rem auto 0; padding: 0 1rem; }
.messages li { background: var(--ok-bg); color: var(--ok-fg); padding: .5rem .75rem; border-radius: .375rem; }
.messages li.error { background: var(--error-bg); color: var(--error-fg); }
.note { color: var(--muted); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }